Mercury toxicity and dental amalgam.

Area of Science:

• Dentistry
• Toxicology
• Materials Science

Background:

• Dental amalgam, a widely used restorative material, contains mercury (Hg).
• Concerns exist regarding the potential health effects of mercury release from amalgam restorations.

Observation:

• Amalgam restorations release Hg into the patient's body during and after placement.
• Hg release occurs through placement procedures, surface abrasion, and corrosion.
• Low-level Hg release from amalgam can persist for years.

Findings:

• Current evidence suggests that if introduced today, amalgam would not meet FDA approval standards.
• New techniques for measuring Hg levels in blood and tissue necessitate further investigation.
• A clear relationship between blood-Hg levels and dental amalgam restorations requires more study.

Implications:

• Additional research is crucial to correlate body-Hg levels with both existing and newly placed amalgam restorations.
• The safety of dental amalgam as a restorative material warrants re-evaluation.
• Understanding the long-term health implications of mercury exposure from dental amalgams is essential.